Cooling and lubricating system for vehicle and vehicle

Abstract

The utility model relates to a cooling and lubricating system for a vehicle and the vehicle. The cooling and lubricating system for the vehicle comprises an electronic pump, a mechanical pump, a main pressure regulating valve, a first cooling and lubricating oil way, a second cooling and lubricating oil way, a high-pressure oil way, a first cooling and lubricating oil way and a second cooling and lubricating oil way, an outlet of the electronic pump is communicated with the first cooling lubricating oil way, an outlet of the mechanical pump is communicated with the high-pressure oil way, an inlet of the main pressure regulating valve is communicated with the high-pressure oil way, and an outlet of the main pressure regulating valve is communicated with the second cooling lubricating oil way. By means of the design, the electric power consumption of the electronic pump is reduced, and the efficient and energy-saving effects are achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of automobiles, in particular to a cooling and lubricating system for a vehicle and the vehicle. BACKGROUND

[0002] In a hybrid vehicle, the engine and the motor jointly provide power for the vehicle. For the hybrid vehicle, the automatic transmission needs to switch between different working modes through the engagement of a clutch or a brake. The stability and rapid response of the clutch engagement control directly affect the gear shifting quality of the whole machine.

[0003] In an automatic transmission of a vehicle, the engagement of the clutch is generally controlled by a hydraulic control system of the vehicle. The hydraulic control system has the functions of combining a large torque and providing damping and cooling lubrication for the engagement of the clutch. In the current cooling and lubricating system, the electric power consumption of the electronic pump on the cooling oil circuit is large. In addition, due to the large number of working modes of the hybrid vehicle (such as pure electric working mode or hybrid working mode), it is necessary to achieve precise flow control for different driving modes. However, the current cooling and lubricating system contains two or more electromagnetic valves, and the flow ratio of the generator in the series and pure electric driving modes is constant, which is limited in energy saving and efficiency. CONTENT OF THE UTILITY MODEL

[0004] Therefore, it is necessary to provide a cooling and lubricating system to reduce the electric power consumption of the electronic pump.

[0005] The present application provides a cooling and lubricating system for a vehicle, comprising an electronic pump, a mechanical pump, a main pressure regulating valve, a first cooling and lubricating oil circuit, a second cooling and lubricating oil circuit, a high-pressure oil circuit for being communicated with a clutch, and the first cooling and lubricating oil circuit and the second cooling and lubricating oil circuit for being communicated with a cooling object, an inlet of the electronic pump being communicated with an oil reservoir, an outlet of the electronic pump being communicated with the first cooling and lubricating oil circuit, an inlet of the mechanical pump being communicated with the oil reservoir, and an outlet of the mechanical pump being communicated with the high-pressure oil circuit, an inlet of the main pressure regulating valve being communicated with the high-pressure oil circuit, and an outlet of the main pressure regulating valve being communicated with the second cooling and lubricating oil circuit.

[0006] Without using two electromagnetic valves, the purpose of adjusting the flow size into the generator can be achieved. In one embodiment, the cooling object comprises a generator, the cooling and lubricating system further comprises a reversing valve and an oil passage for being communicated with the generator, a first inlet of the reversing valve being communicated with the main oil circuit, and a discharge port of the reversing valve being communicated with the oil passage, and the oil passage being respectively communicated with the outlet of the first cooling and lubricating oil circuit and the outlet of the second cooling and lubricating oil circuit.

[0007] In one of the embodiments, the part to be cooled further comprises a driving motor and the clutch, the cooling and lubricating system further comprises a first oil path for leading to the driving motor and a second oil path for communicating with at least the low-pressure channel of the clutch, the first oil path, the second oil path and the oil channel are arranged in parallel, and the first oil path and the second oil path after being arranged in parallel are both in communication with the outlet of the first cooling and lubricating oil path and the outlet of the second cooling and lubricating oil path.

[0008] It can be understood that, according to actual needs, the on-off of the reversing valve can be controlled without setting two electromagnetic valves, so as to control the cooling flow rate into the generator, that is, the generator can be supplied with oil only through the oil channel or supplied with oil through the oil channel and the reversing valve at the same time, thereby effectively avoiding the problem of excessive cooling and lubricating oil in a specific mode, reducing the electric power consumption of the electronic pump, i.e. reducing the low-pressure electric power consumption, saving energy and achieving the effect of high efficiency and energy saving.

[0009] In one of the embodiments, the oil channel is provided with a throttling hole, the reversing valve is in communication with the generator after being arranged in parallel with the throttling hole, and the second inlet of the reversing valve is in communication with the outlet of the first cooling and lubricating oil path and the outlet of the second cooling and lubricating oil path, respectively.

[0010] In one of the embodiments, a high-pressure filter is arranged on the high-pressure oil path, a first position where the high-pressure oil path is in communication with the first inlet of the reversing valve is defined, a second position where the high-pressure oil path is connected with the inlet of the main pressure regulating valve is defined, the first position is located upstream of the second position along the fluid flow path in the high-pressure oil path, and the high-pressure filter is located upstream of the first position.

[0011] In one of the embodiments, a main lubricating oil path is further included, the first cooling and lubricating oil path and the second cooling and lubricating oil path are in communication with the inlet end of the main lubricating oil path after being merged, and the outlet end of the main lubricating oil path is in communication with the first oil path, the second oil path and the oil channel, respectively.

[0012] In one of the embodiments, a cooler is arranged on the main lubricating oil path, and the cooler is located upstream of the first oil path and the second oil path along the fluid flow path in the main lubricating oil path.

[0013] In one of the embodiments, when the vehicle is in the pure electric mode, the mechanical pump is in the unstarted state, the electronic pump is in the started state, and the reversing valve is in the closed and disconnected state; when the vehicle is in the series hybrid mode, the mechanical pump and the electronic pump are both in the started state, and the reversing valve is in the open and connected state.

[0014] In one of the embodiments, the mechanical pump is used to be coupled with the engine.

[0015] In one of the embodiments, the high-pressure oil passage comprises a main passage, a first branch passage and a second branch passage, a first end of the main passage is communicated with the mechanical pump, a first flow inlet of the main pressure regulating valve is communicated with a second end of the main passage through the first branch passage, a first end of the second branch passage is also communicated with the second end of the main passage, and a second end of the second branch passage is communicated with an inlet of the pressure proportional electromagnetic valve, an outlet of the pressure proportional electromagnetic valve is communicated with a second flow inlet of the main pressure regulating valve through a first communication oil passage, and the outlet of the pressure proportional electromagnetic valve is communicated with the clutch through a second communication oil passage, and a first inlet of the reversing valve is communicated with the main passage.

[0016] In one of the embodiments, when the vehicle is in the parallel hybrid mode or the engine direct drive mode, the mechanical pump is in the starting state.

[0017] The application also provides a vehicle, which is a hybrid vehicle and comprises the cooling and lubricating system in any one of the above embodiments.

[0018] Compared with the prior art, in the cooling and lubricating system provided by the application, the mechanical pump and the electronic pump are combined, the mechanical pump supplies oil to the high-pressure oil passage, and at the same time, the main pressure regulating valve is used to supply oil to the second cooling and lubricating oil passage, the electronic pump can supply oil to the first cooling and lubricating oil passage, the first cooling and lubricating oil passage and the second cooling and lubricating oil passage can supply oil to the to-be-cooled parts, thus, the mechanical pump supplies oil to the second cooling and lubricating oil passage through the high-pressure oil passage and the main pressure regulating valve, the electric power consumption of the electronic pump is reduced, that is, the low-voltage power consumption is reduced, and the effect of high efficiency and energy saving is achieved. The to-be-cooled parts are the driving motor and the clutch, when the vehicle is in the series mode, the parallel mode or the engine direct drive mode, the mechanical pump preferentially provides the cooling flow, and the electronic pump is used as a supplement to supplement the cooling flow, and according to different modes of the vehicle, the reversing valve is opened and closed, two electromagnetic valves are not needed, the purpose of controlling the size of the cooling flow into the generator is achieved, that is, the generator is supplied with oil only through the oil passage, or the generator is supplied with oil through the oil passage and the reversing valve at the same time, the problem of excessive cooling and lubricating oil in a specific mode is effectively avoided, the electric power consumption of the electronic pump is further reduced, that is, the low-voltage power consumption is further reduced, energy is saved, and the effect of high efficiency and energy saving is achieved. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description only show some of the embodiments of the application, and for those skilled in the art, other drawings can also be obtained from these drawings without any creative effort.

[0020] Figure 1Fig. 1 is a schematic view of a cooling lubrication system according to an embodiment of the present application;

[0021] Figure 2 Fig. 1 is a schematic view of a cooling lubrication system according to an embodiment of the present application;

[0022] Reference numerals: 01, suction strainer; 1, electronic pump; 11, first cooling lubricating oil passage; 2, mechanical pump; 21, second cooling lubricating oil passage; 3, main pressure regulating valve; 30, first flow inlet; 31, flow outlet; 32, second flow inlet; 4, high-pressure oil passage; 41, main passage; 411, high-pressure filter; 412, first position; 413, second position; 42, first branch passage; 43, second branch passage; 44, first communication oil passage; 45, second communication oil passage; 51, first oil passage; 52, second oil passage; 53, oil passage; 531, orifice; 6, main lubricating oil passage; 61, cooler; 7, reversing valve; 71, first inlet; 72, discharge port; 73, second inlet; 8, pressure proportional solenoid valve; 9, clutch; P1, generator; P3, drive motor. DETAILED DESCRIPTION

[0023] In order to make the above objectives, features and advantages of the present application more clear and comprehensible, the specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. In the following description, a lot of specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be implemented in many different ways other than those described herein, and one of ordinary skill in the art can make similar improvements without departing from the spirit of the present application, and therefore the present application is not limited to the specific embodiments disclosed below.

[0024] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on the other component or there can be an intermediate component. When a component is referred to as being "connected to" another component, it can be directly connected to the other component or there can be an intermediate component. The terms "vertical", "horizontal", "upper", "lower", "left", "right", "side", "top", "bottom", and similar expressions used in the description of the present application are used only to describe various example structural parts and elements of the present application, but are used only for the purpose of convenience of explanation, and are determined based on the example orientation shown in the drawings, and do not mean the only embodiment. Since the embodiments disclosed in the present application can be arranged in different directions, these terms indicating the direction are used only for the purpose of explanation and should not be considered as limiting, such as "upper" and "lower" are not necessarily limited to the direction opposite or consistent with the direction of gravity.

[0025] In addition, the terms "first", "second", etc. are used herein only to describe different instances, and are not used to denote or imply relative importance or a number of indications of the technical features indicated. Thus, the technical features defined with "first", "second", etc. can explicitly or implicitly include at least one of the technical features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise explicitly and specifically limited.

[0026] In the present application, unless otherwise explicitly specified and limited, the "on", "under", "above" and "over" of the first feature to the second feature can be that the first feature is in direct contact with the second feature, or the first feature is indirectly in contact with the second feature through an intermediate medium. Moreover, the "on", "above" and "over" of the first feature to the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the first feature is horizontally higher than the second feature. The "under", "below" and "under" of the first feature to the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the first feature is horizontally lower than the second feature.

[0027] Unless otherwise defined, all technical and scientific terms used in the specification of the present application have the same meaning as commonly understood by a person skilled in the art to which the present application belongs. The terms used in the specification of the present application are only for the purpose of describing the specific embodiments, and are not intended to limit the present application. The term "and / or" used in the specification of the present application includes any and all combinations of one or more of the related listed items.

[0028] Referring to Figure 1 and Figure 2 , the present application provides a cooling lubrication system for a vehicle, i.e. the cooling lubrication system is applied to a vehicle, which is a hybrid vehicle.

[0029] As shown in Figure 1 and Figure 2 , the above cooling lubrication system comprises an oil reservoir, an electronic pump 1, a mechanical pump 2, a main pressure regulating valve 3, a first cooling lubrication oil circuit 11, a second cooling lubrication oil circuit 21, a high-pressure oil circuit 4, a reversing valve 7, a first oil circuit 51 for leading to a drive motor P3, a second oil circuit 52 for communicating with at least a low-pressure passage of a clutch 9, and an oil passage 53 for leading to a generator P1. Among them, the first cooling lubrication oil circuit 11 and the second cooling lubrication oil circuit 21 are used to lead to a to-be-cooled member. The to-be-cooled member includes any one of the generator P1, the drive motor P3 and the clutch 9. In the present embodiment, the to-be-cooled member includes the generator P1, the drive motor P3 and the clutch 9.

[0030] The inlet of the electronic pump 1 is connected to an oil reservoir, the outlet of the electronic pump 1 is connected to the first cooling lubricating oil passage 11, the inlet of the mechanical pump 2 is connected to the oil reservoir, and the outlet of the mechanical pump 2 is connected to the high-pressure oil passage 4, the first flow inlet 30 of the main pressure regulating valve 3 is connected to the high-pressure oil passage 4, and the flow outlet 31 of the main pressure regulating valve 3 is connected to the second cooling lubricating oil passage 21. The oil reservoir can be an oil pan, and the electronic pump and / or the mechanical pump are connected to the oil pan through a suction filter 01.

[0031] In an embodiment, the second oil passage 52 only supplies oil to the clutch 9. In another embodiment, the second oil passage 52 supplies oil to the clutch 9 and also supplies oil to mechanical components such as shaft teeth. That is, the second oil passage 52 is at least connected to the clutch 9.

[0032] In the present embodiment, the mechanical pump 2 is coupled to the engine, i.e. the mechanical pump 2 is started when the engine is started. It can be understood that when the engine is started, the mechanical pump 2 can supply oil to the high-pressure oil passage 4, and at the same time, the main pressure regulating valve 3 can supply oil to the second cooling lubricating oil passage 21.

[0033] The first oil passage 51, the second oil passage 52 and the oil passage 53 are arranged in parallel, and the parallel first oil passage 51, the second oil passage 52 and the oil passage 53 are connected to the outlet of the first cooling lubricating oil passage 11 and the outlet of the second cooling lubricating oil passage 21. In the present embodiment, the outlet of the first cooling lubricating oil passage 11 and the outlet of the second cooling lubricating oil passage 21 are connected to the parallel first oil passage 51, the second oil passage 52 and the oil passage 53 through the main lubricating oil passage 6. That is, the first cooling lubricating oil passage 11 and the second cooling lubricating oil passage 21 are connected to the inlet end of the main lubricating oil passage 6 after being merged, and the outlet end of the main lubricating oil passage 6 is connected to the first oil passage 51, the second oil passage 52 and the oil passage 53, respectively. In addition, the main lubricating oil passage 6 is provided with a cooler 61, and the cooler 61 is located upstream of the first oil passage 51 and the second oil passage 52 along the flow path of the fluid in the main lubricating oil passage 6.

[0034] It can be understood that when the vehicle is in the pure electric mode, since the oil passage 53 is not provided with a throttle hole 531, the electronic pump 1 provides cooling flow to the drive motor P3 and the clutch 9 through the first oil passage 51 and the second oil passage 52, which can reduce the low-pressure power consumption of the electronic pump 1.

[0035] In an embodiment, the oil passage 53 is provided with a throttle hole 531, the first inlet 71 of the reversing valve 7 is connected with the high-pressure oil passage 4, and the discharge port 72 of the reversing valve 7 is connected with the oil passage 53. That is, the reversing valve 7 is connected with the generator P1 in parallel with the throttle hole 531, and specifically, the second inlet 73 of the reversing valve 7 and the inlet end of the throttle hole 531 are both connected with the outlet end of the main lubricating oil passage 6, that is, the second inlet 73 of the reversing valve 7 and the inlet end of the throttle hole 531 are both connected with the first cooling lubricating oil passage 11 and the second cooling lubricating oil passage 21 through the main lubricating oil passage 6.

[0036] In the pure electric mode, the mechanical pump 2 is in the non-starting state, the electronic pump 1 is in the starting state, and the reversing valve 7 is in the closed and disconnected state; in the series hybrid mode, the mechanical pump 2 and the electronic pump 1 are both in the starting state, and the reversing valve 7 is in the open and connected state.

[0037] It can be understood that in the pure electric mode, the electronic pump 1 only provides a small cooling flow to the generator P1 through the throttle hole 531. In the series hybrid mode, the mechanical pump 2 supplies oil to the second cooling lubricating oil passage 21 through the main pressure regulating valve 3 on the high-pressure oil passage 4, and the electronic pump 1 supplies oil (cooling amount) to the first cooling lubricating oil passage 11, and the first cooling lubricating oil passage 11 and the second cooling lubricating oil passage 21 are combined and then supply oil to the first oil passage 51 and the second oil passage 52 through the main lubricating oil passage 6. In addition, in the series hybrid mode, oil can also be supplied to the generator P1 through the reversing valve 7, that is, oil is supplied to the generator P1 through the throttle hole 531 and the reversing valve 7 respectively, so that a large cooling lubricating flow is provided to the generator P1.

[0038] In an embodiment, the high-pressure oil passage 4 is provided with a high-pressure filter 411, the position where the high-pressure oil passage 4 is connected with the first inlet 71 of the reversing valve 7 is defined as a first position 412, and the position where the high-pressure oil passage 4 is connected with the inlet of the main pressure regulating valve 3 is defined as a second position 413. Along the fluid flow path in the high-pressure oil passage 4, the first position 412 is located upstream of the second position 413, and the high-pressure filter 411 is located on the main passage 41 and upstream of the first position 412.

[0039] In the embodiment, the high pressure oil circuit 4 comprises a main line 41, a first branch line 42 and a second branch line 43. The first end of the main line 41 is connected to the mechanical pump 2. The first flow inlet 30 of the main regulating valve 3 is connected to the second end of the main line 41 through the first branch line 42. The first end of the second branch line 43 is also connected to the second end of the main line 41. The second end of the second branch line 43 is connected to the inlet of the pressure proportional solenoid valve 8. The outlet of the pressure proportional solenoid valve 8 is connected to the second flow inlet 32 of the main regulating valve 3 through the first communication oil line 44. The outlet of the pressure proportional solenoid valve 8 is also connected to the clutch 9 through the second communication oil line 45. In addition, the first inlet 71 of the reversing valve 7 is connected to the main line 41. That is, the first position 412 is located on the main line 41, and the second position 413 is the second end of the main line 41. The pressure proportional solenoid valve 8 has the same structure as the proportional solenoid valve in the prior art.

[0040] It can be understood that there are two oil flows to the clutch 9. One is the high pressure oil circuit for controlling the engagement of the clutch 9, which flows into the clutch 9 through the second branch line 43 and the second communication oil line 45 in sequence. The other is the cooling lubricating oil provided to the clutch 9, which flows into the clutch 9 through the main lubricating oil line 6 and the second oil line 52.

[0041] In the embodiment, in the series hybrid mode, the engine drives the generator P1, and the electric energy generated by the generator P1 is used to drive the motor P3, and the remaining electric energy is stored in the battery. In the series hybrid mode, the pressure proportional solenoid valve 8 is not powered, and the second flow inlet 32 of the main regulating valve is closed by the spool.

[0042] In parallel hybrid mode or engine direct drive mode, the pressure proportional solenoid valve 8 is powered on. The mechanical pump 2 is started with the engine, and the reversing valve 7 is in the open communication state. The spool of the main pressure regulating valve 3 moves to the right, and when the pressure of the first branch 42 is equal to the pressure of the first communication oil way 44, the spool of the main pressure regulating valve 3 is prevented from continuing to move to the right. Because the pressure of the second branch 43 is equal to that of the first branch 42, by adjusting the pressure proportional solenoid valve 8, a pressure difference is established between the second branch 43 and the first communication oil way 44 (i.e. the pressure of the second branch 43 is higher than that of the first communication oil way 44), that is, the pressure at the first flow inlet 30 of the main pressure regulating valve 3 is greater than that at the second flow inlet 32, at this time, the spool of the main pressure regulating valve 3 moves to the right to a state in which the first branch 42 is in communication with the second cooling and lubricating oil way 21. The electronic pump 1 works, and the oil from the electronic pump 1 is supplied to the first cooling and lubricating oil way 11, and the cooling oil after the second cooling and lubricating oil way 21 and the first cooling and lubricating oil way 11 are combined flows to the drive motor P3, the generator P1 and the clutch 9 through the main lubricating oil way 6.

[0043] It can be understood that when the vehicle is in pure electric mode, the electronic pump 1 only provides a small cooling flow to the generator P1 through the throttle hole 531. In series hybrid mode or parallel hybrid mode, the generator P1 can be supplied with oil through the reversing valve 7 and the throttle hole 531 respectively, that is, the generator P1 is provided with a large cooling and lubricating flow. Therefore, the cooling and lubricating system of the application can control the proportion of the cooling flow to the generator P1 according to different driving modes, realize more accurate flow control, avoid the problem of excessive cooling and lubricating oil in a specific mode, and reduce the electric power consumption of the electronic pump 1.

[0044] In this embodiment, when the vehicle is in series, parallel or engine direct drive mode, the mechanical pump 2 is the primary source of system cooling and lubricating flow, that is, the mechanical pump 2 preferentially provides cooling flow, and the electronic pump 1 supplements the flow, thereby reducing the electric power consumption of the electronic pump 1, that is, reducing the low-voltage power consumption.

[0045] The technical features of the above-mentioned embodiments can be combined in any way. In order to make the description simple, not all possible combinations of the technical features in the above-mentioned embodiments are described, however, as long as the combinations of the technical features do not exist contradictory, they should be considered as the scope of the present application.

[0046] The above-described embodiments are merely illustrative of several embodiments of the present application, which are described in more detail and in a specific manner, but should not be construed as limiting the scope of the patent application. It should be noted that for those skilled in the art, several modifications and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the patent protection scope of the present application should be subject to the appended claims.

Claims

1. A cooling and lubrication system for a vehicle, characterized in that, It includes an electronic pump (1), a mechanical pump (2), a main pressure regulating valve (3), a high-pressure oil circuit (4) for connecting to a clutch (9), and a first cooling lubricating oil circuit (11) and a second cooling lubricating oil circuit (21) both for connecting to the parts to be cooled. The inlet of the electronic pump (1) is connected to an oil reservoir, and the outlet of the electronic pump (1) is connected to the first cooling lubricating oil circuit (11). The inlet of the mechanical pump (2) is connected to an oil reservoir, and the outlet of the mechanical pump (2) is connected to the high-pressure oil circuit (4). The first inlet (30) of the main pressure regulating valve (3) is connected to the high-pressure oil circuit (4), and the outlet (31) of the main pressure regulating valve (3) is connected to the second cooling lubricating oil circuit (21).

2. The cooling and lubrication system according to claim 1, characterized in that, The component to be cooled includes a generator. The cooling and lubrication system also includes a reversing valve (7) and an oil passage (53) for accessing the generator. The first inlet (71) of the reversing valve (7) is connected to the high-pressure oil circuit (4), and the outlet (72) of the reversing valve (7) is connected to the oil passage (53). The oil passage (53) is connected to the outlet of the first cooling and lubrication oil circuit (11) and the outlet of the second cooling and lubrication oil circuit (21), respectively.

3. The cooling and lubrication system according to claim 2, characterized in that, The component to be cooled also includes a drive motor and the clutch (9). The cooling and lubrication system also includes a first oil passage (51) leading to the drive motor and a second oil passage (52) connected to at least the low-pressure channel of the clutch (9). The first oil passage (51), the second oil passage (52) and the oil channel (53) are arranged in parallel. The first oil passage (51) and the second oil passage (52) after being connected in parallel are both connected to the outlet of the first cooling and lubrication oil passage (11) and the outlet of the second cooling and lubrication oil passage (21).

4. The cooling and lubrication system according to claim 2, characterized in that, The oil passage (53) is provided with a throttle orifice (531). The reversing valve (7) is connected in parallel with the throttle orifice (531) and then connected to the generator. The second inlet (73) of the reversing valve (7) is connected to the outlet of the first cooling lubricating oil passage (11) and the outlet of the second cooling lubricating oil passage (21), respectively.

5. The cooling and lubrication system according to claim 2, characterized in that, A high-pressure filter (411) is provided on the high-pressure oil circuit (4). The position where the high-pressure oil circuit (4) is connected to the first inlet (71) of the reversing valve (7) is defined as the first position (412). The position where the high-pressure oil circuit (4) is connected to the first flow inlet (30) of the main pressure regulating valve (3) is defined as the second position (413). Along the fluid flow path in the high-pressure oil circuit (4), the first position (412) is located upstream of the second position (413), and the high-pressure filter (411) is located upstream of the first position (412).

6. The cooling and lubrication system according to claim 3, characterized in that, It also includes a main lubrication oil passage (6), the first cooling lubrication oil passage (11) and the second cooling lubrication oil passage (21) are connected to the inlet end of the main lubrication oil passage (6) after they merge, and the outlet end of the main lubrication oil passage (6) is connected to the first oil passage (51), the second oil passage (52) and the oil passage (53) respectively.

7. The cooling and lubrication system according to claim 6, characterized in that, A cooler (61) is provided on the main lubrication oil passage (6). Along the flow path of the fluid in the main lubrication oil passage (6), the cooler (61) is located upstream of the first oil passage (51) and the second oil passage (52).

8. The cooling and lubrication system according to claim 4, characterized in that, When the vehicle is in pure electric mode, the mechanical pump (2) is not started, the electronic pump (1) is started, and the reversing valve (7) is closed in the disconnected state; when the vehicle is in any of the series hybrid, parallel hybrid, and engine direct drive modes, both the mechanical pump (2) and the electronic pump (1) are started, and the reversing valve (7) is open in the connected state.

9. The cooling and lubrication system according to claim 2, characterized in that, The mechanical pump (2) is used to couple with the engine.

10. The cooling and lubrication system according to any one of claims 2 to 9, characterized in that, The high-pressure oil circuit (4) includes a main circuit (41), a first branch circuit (42), and a second branch circuit (43). The first end of the main circuit (41) is connected to the mechanical pump (2). The first inlet (30) of the main pressure regulating valve (3) is connected to the second end of the main circuit (41) through the first branch circuit (42). The first end of the second branch circuit (43) is also connected to the second end of the main circuit (41). The second end of the second branch circuit (43) is connected to the inlet of the pressure proportional solenoid valve (8). The outlet of the pressure proportional solenoid valve (8) is connected to the second inlet (32) of the main pressure regulating valve (3) through the first connecting oil circuit (44). The outlet of the pressure proportional solenoid valve (8) is connected to the clutch (9) through the second connecting oil circuit (45). The first inlet (71) of the reversing valve (7) is connected to the main circuit (41).

11. A vehicle, characterized in that, The vehicle is a hybrid vehicle and includes the cooling and lubrication system as described in any one of claims 1 to 10.

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